Pro PDC22 Stereo Direct Box Dual DI Unit Instrument Unbalanced Balanced PylePro Model : PDC22 1/4'' XLR Direct Box Dual 1/4'' Instrument To Balanced Unbalanced (1/4'' XLR) Direct Box Construction: All Steel Chassis Ground Lift: Switch-Able Ground Lift Balanced Output: 600 Balanced XLR Jack Instrument Input: 50K Unbalanced TS Jack Parallel (Link) Out: 50K Unbalanced TS Jack Input Attenuation: Switch-Able (0db,-20db,-40db) Two High-Quality Direct Boxes In One Convenient Enclosure Dimension: 5.5'' x 4.72 x 1.57 '' Pyle PDC22 is a necessity if you are looking for the higest quality of sound, with low distortion, noise, and eliminate ground loops. A DI unit, DI box, Direct Box, Direct Input, Direct Injection or simply DI is an electronic device that connects a high impedance, line level, unbalanced output signal to a low impedance mic level balanced input, usually via XLR connector. DIs are frequently used to connect an electric guitar or electric bass to a mixing console's microphone input. The DI performs level matching, balancing, and either active buffering or passive impedance bridging to minimise noise, distortion, and ground loops. DIs do not perform impedance matching. Pyle has been in business for over 35 years, and their manufacturing experience and expertise is easy to see - and hear. DEVICE CONNECTOR: Provides a variety of DI solutions with its OE inch device connector and detachable AC power cord for live sound recording applications. It allows you to easily connect keyboards, guitars outboard signal processors PROVIDES CLEAN AUDIO: Useful for connecting unbalanced signals from sources submixers, effects processors keyboards to a main PA or recording mixer. This impedance transformer also has buzz hum cancellation ability EASILY CONNECTS INSTRUMENTS: Getting the signal of a musical instrument to the PA system is easier with this direct box. Just connect the electric bass, guitar, keyboard or other processors to the ground lift adapter enjoy pure clean audio VERSATILE DIRECT BOX: Aside from music instruments, the DI unit can also be connected to the line output of a boom box or consumer stereo system if you want to sample old records. The hum eliminator is used for connecting unbalanced devices as well